Ironmaking oxidized pellet additive

Abstract

The invention discloses the globe group chemic additive used in the mine, it is the powder duplicating mix compound. The granularity exceeds 200 items, the team element (the weight percent): the adding adhesive is 30-50%; the adding oxygen activator is 10-25%; the intensifying reagent is 10-25%; the carrier is 30-50%. The produced additive has not Si, AL, K, Na element which are harmful for the piddling. It can replace fully the expanding moist soil in producing the ball and is need to depress the quality of the globe group mine, the request of the quality can be reached and exceeded with the adding of the 0.4-0.6% additive in the globe group material, the ability of the metallurgy under the high temperature in the globe group material can be improved highly. The function of the additive exceeds the function of the expanding moist soil highly.

Description

technical field [0001] The invention relates to an additive for oxidized pellets used in blast furnace ironmaking, and belongs to high-temperature solid-phase bonding technology. It is mainly used to replace bentonite to improve the green pellet strength, burst temperature, compressive strength and high-temperature metallurgical properties of oxidized pellets. Background technique [0002] Blast furnace ironmaking is based on concentrates, and pellets have excellent metallurgical properties such as high iron content, good reducibility, high cold strength, low FeO content, and high bulk specific gravity. Increasing the proportion of pellets is an important means to optimize the structure of blast furnace charge, promote energy saving and consumption reduction in ironmaking process, increase production, reduce cost, and realize environmental friendliness. Increasing the utilization ratio of pellets is the technical development direction of blast furnace ironmaking. The propo...

AI Technical Summary

Problems solved by technology

However, on the one hand, due to the high price of such additives (20,000-70,000 yuan / ton), on the other hand, when the green pellets are dried, there are defects such as a drop in burst temperature, so there is no pellet production enterprise in China. Organic binders are used in production